Wondering if there are any good sets around level 23, the Blood Echelon has served me well so far, and I'm hesistant to piecemeal upgrade because the rest of the pieces of the set will lose power until they are all replaced.

The Scorpion set has pieces with level requirements from 18 to 29. You would have to check if higher level equipment would make up for breaking up your current set, though.I think the level 15 Annihilator set (originally a Steam exclusive for DKS) is just available using the Developer Mode cheat window.That's it for warrior specific sets until later in the game. Some people like the 4 piece Ulthring's set (level 29/30) because it allows more flexibility with weapon and jewellery choices.

With my warrior in the original release of D2:ED I didn't use any full sets, just random loot and purchases. For my ranger in DKS I used the Mining Guild set from level 16 until 28. Once I could equip the Bow of Orobas it was worth breaking the set, which in turn made other equipment I had been holding on to better, and I ended up replacing everything.

I'd try Uthring's armor set if you haven't found it yet. You get it by basically mindreading each floating fortress general in the Orobas Fjords. The set it worth it, but be warned the enemies and bosses are tough as hell if you didn't balance your char right. I rec this for when you're level 30 or approaching at least....

Also, when you get to Aleroth there is the Order of the Viper armor set. very nice.

Blood Echelon is a good set though, so I'd keep it until you find better individual stuff and/or one of the sets I told you about.